I implemented the Top Commenters plugin, although I had to make a few changes to it to make sure that it worked the way that I want it to. It will not show anybody who hasn’t posted at least twice, and it will not show trackbacks. That way, the list will stay a bit more relevant. If you provide a website address, then you will get a link to it from my sidebar if you appear on the list. Let me know if you notice anything acting funny.

Update:
The Top Commenters plugin has been updated with a few bug fixes. So, I downloaded and installed that, although it only included one of my improvements to the plugin. You can get the latest version here.